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Topic: OLED breakout pitches? (Read 2395 times) previous topic - next topic

OLED breakout pitches?

I'm doing some OLED breakout boards and I need one more pitch.

I've got 0.5, 0.6, 0.62, 0.65, 0.7, 0.8 and 0.845 but I really would like one more pitch to fill up an empty space on the pcb. Any suggestions?

Re: OLED breakout pitches?

Reply #1
I dunno, that seems the ones I got also.

Interested in your breakout :)

Re: OLED breakout pitches?

Reply #2
The files are available at https://github.com/SmallRoomLabs/NanoUtils .  I'll probably do them as a PAW in a week or two, if you can wait I'll send a board to you then, or you can send for a batch yourself....

Currently I have used 10 mil wide pads for all the different pitches.  I hope that by having a narrow pad the risk for solder bridges under will be reduced a bit.  Maybe I should make them wider for the larger pitches - what do you think?

Re: OLED breakout pitches?

Reply #3
We had a simular discussion in our workshop regarding padwidth vs pitch. this describes QFP packages, but should also apply to other packages.

Quote
Luckily its on one of the datasheet I've read for the qfp packages.

For qfp pins width

Pad width = 60% of pin pitch.

Bonus one

Pad length = foot length (not pin length) + 0.5mm(toe) + 0.5mm (heel)

Re: OLED breakout pitches?

Reply #4
I changed the widths of the pads a bit...

0.50mm  pitch 3.048 x 0.2032 pads = 40% of pitch
0.60mm  pitch 3.048 x 0.2032 pads = 33% of pitch
0.62mm  pitch 3.048 x 0.2032 pads = 33% of pitch
0.65mm  pitch 3.048 x 0.2032 pads = 31% of pitch
0.70mm  pitch 3.048 x 0.2032 pads = 29% of pitch
0.80mm  pitch 3.048 x 0.3048 pads = 38% of pitch
0.845mm pitch 3.048 x 0.4064 pads = 48% of pitch
1.00mm pitch 3.048 x 0.4064 pads = 40% of pitch

Re: OLED breakout pitches?

Reply #5
I suppose you're using Eagle are you? I got a converter from Eagle to Altium, but haven't tried it, not really expecting it to work too well. I have Eagle on one machine, but tried to drive it a year or two ago without going through the tutorials and YUK! Such a difficult way to do anything, at least it seemed it.

 

Re: OLED breakout pitches?

Reply #6
Oh just checked out your other boards, some nice ideas there Mats, good stuff.